I have a 1970 GTO convertible with incorrect tranny and want to have correct coded tranny. Looking for code 'PY 70' to match the 400 YS code engine. Does anybody out there know where to look? or who to try? Thanks.

Um if im correct all the big v-8 GM motors untill 1987 had turbo 400 trannys (my moms old 85 truck had one in it) the are pretty common i bet ebay or a junk yard if u dnt mind rebuilding it will have a turbo 400 just gotta look for the py 70